simple web server that allows a host to post a file transfer

api.py

from flask import Flask, abort, request
from werkzeug.utils import secure_filename
import os
import requests
import json

# change this to set where you want the file to be saved
UPLOAD_FOLDER = "./"

# change this to only allow files with a given extension to be accepted
ALLOWED_EXTENSIONS = ["txt", "zip"]


app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER


# function that returns True if the file that was sent from host has a valid extension
def allowed_file(filename):
    return '.' in filename and filename.split('.', 1)[1].lower() in ALLOWED_EXTENSIONS

# this handles the route
@app.route("/recipe", methods=['POST'])
def recipe(store_id=None):
    # if the client tries to do anything other than POST, abort.
    if request.method == 'POST':
        if 'file' not in request.files:
            abort(404)
        file = request.files['file']
        if file and allowed_file(file.filename):
            filename = secure_filename(file.filename)  #secure_filename just makes sure the file name is valid
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            return {"msg": "file upload success"}, 200
    else:
        abort(404)


if __name__ == "__main__":
    app.run(host='0.0.0.0',port=5000, debug=True)